Improvement in spiral springs for bedsteads



tilted y mes met @tittie- Letters Patent No. 109,573, dated November 29, 1870.

IMPROVEMENT iN ySPIRAL SPRlNG'S` FOR BEDS-TEADS.

The Schedule referred to in these Letters Patent and making part of the same.

l WILLIAM L. BnAnnsLnv, ot' Binghamton, in the county of Broome and State of New York, have invented certain Ixnln'ovcxncnts in Spiral Springs l'or Bedsteads or other purposes, ot' which :the tbllowing is a specitication.

My invention consists in bending and rcversin an extension ot' the lower coil ot' a conical spiral spring in such a manner that said reversed part and the npperzend may, by turning the body ot'the spring, enter corresponding eyes attached tothe slats between which it is placed, thereby forming a section ot' a screw, the reversed part ofthe lower coil and the end ot" the npper coil constituting the thread, and the eyes the t'einale screw, whereby the Aspring` may be more readily.

and inore eficctive in its operation.-

Figure l in the accompanying'drawing is an elevation ot' a spring in position embodying lnyinvention.

Figure 2 is the sprinr` detached, showillg the reversed extension of the lower coil on' the end ot' the upper'coil, both ends moving in the saine direction vwhen the body ot' the spring istnrned to the right or left.

A is the spring, which is coiled in the usual conical forni.

B is an extension of the lower coil, which is bent back in a reversed direction. v A

C Gare the.eyes,which are attached to and between attached and detached than by the ordinary method,

slots D1), or a curved line corresponding with curve ofthe reversed partl and the upper coil E. Said re? versed end ot' the coil should be bent to correspond with the circular form ot'the lower coihand to a horizontal line, so as to form an angle with said coil from the elbow F to the end ot'l the reversed part B, corresponding to the pitch of the coil. rlvhis will allow a more-natural and `1`uil action of the spring.

When my improved spring is applied to bedstead-s, the eyes- C C are iirst secured to the slats, which are then connected by coinmencingfbt the end of each pair and turning in the springs successively in the direction ot' the dott-ed lines shown by tig. 2, until the elbow ll comes in contact with Atheeye C. 1

1f a spring should prove defective, it may be readily removed withont disturbing the others, while, by the ordinary method, -a `spring cannot be replaced withoutl iii-st drawing the staples or eyes and sepa! rating the slats;

I claim as iny invention- .The spring A, provided with the reversed extension` B, iircoiubination with the eyes C C, substantially, and t'or the purposes hereinbeore set forth.

' yWFL. BEARDSLEY.

` \Vit-nesses:

Jos. GILLESPIE, G. H. VVAITE. 

